If trains are a special interest of yours, there are two further possibilities. You may be one of those who, like connoisseurs of boiled eggs, know exactly how they want them to be prepared and presented. If that is so, then beware, for I have tried here to provide a fresh look, which makes it difficult to provide the experience of revisiting old territory. The other possibility is that you belong to another group which likes the whole business of Rail Transport, finds it a stimulating area to be in, and is interested to see similar things from a slightly altered perspective, or different...